Bending-machine.



No. 886,027. PATENTED APR. 28, 1908.

A. WOOD.

BENDING MACHINE.

, APPLICATION FILED FEB. 27, 1908.

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Attorney UNITED s'rAT s rArENT OFFICE.

' AUGUSTUS WOOD, Ol HAMILTON, OHIO, ASSIGNOR TO NILES-BEMENT-POND COMPANY, OF

JERSEY CITY,

NEW JERSEY.

BENDING-MACHINE I Specification of Letters Patent.

Patented April 28, 1908.

To all whom it may concern:

Be it known that I, AUGUSTUS Wool), a citizen of the United States, residing at Hamilton, Butler county, ()hio, have invented certain new and useful Improvements in Bending-Machines, of which the following is a specification.

This invention pertains to improvements in that class of bending machines involving a pair of clamp-members for clamping sheet metal, either between dies for the direct bending of themetal or for merely holding the metal while it is bent by hammering some projecting portion of the sheet. Occasions arise, in the use of this class of machines, when, in order to bring the active parts of the machine to bear upon the proper portion of a plate some very large formation of or attachment to the plate must be passed between the clamping members of the machine. Such cases sometimes arise in.the formation of certain forms of metallic car trucks.

My improved machine will be readily understood from the following description taken in connection with the accompanying drawing which Figure 1 is a front elevation of a bending machine exemplifying my improvements, part appearing in vertical longltudinal section: and Fi 2 an end elevation of the same on a reduce scale.

In the drawing:1, indicates a vertically slotted housing: 2, a similar housing: 3, a bridge-piece firmly secured to 'the bases of the two housings and forming the lower clamp-member of the machine: 4, a gate fornnng the upper clamp-member of the machine, this ate bein r above and in the vertical plane the bri ge-piece and having its ends fitted to slide vertically infthe slots, of the housings: 5, a nut vertically j ournaled in the top of each of the housings over the ends of the gate: 6, handles on these nuts to serve in turning them: 7, tie-bars connecting the upper ends of the housings: 8, a screw for each of the rotary nuts 5: 9, downward extensions of the screws 8, these extensions be.- ing flat and extending from the screws down through inortises in the ends of the gate where the gate fits in the slots of the housings: 10, a vertical series of perforations in each of the flat screw-extensions 9: 11, pins .removably inserted in a selected perforation in each of the flat screw extensions: 12, washers on the flat screw extensions, over the ends of the gate: 13, .a'vertical cylinder disposed under each end of the gate: 14, a plunger working in each of the cylinders, the upper ends of the plungers projecting up from the cylinders and engaging under the ends of the gate: and 15, piping, to be connected with a source of su ply of fluid under pressure to )ermit of the uid being admitted ,to and exausted from the two cylinders.

The clamping or pressing power of the machine is gotten by means of the handles 6 which, upon bein turned, forces the screws downward and, t rough the medium of the flat screw extensions and the pins, forces the gate down toward the bridge-piece.

If it be-desired to raise the gate, the pressufficiently to permit the pins to be withdrawn, after. which thefluid may be admitted to the cylinder causing the two plungers to rise and uickly elevate the gate to any point desired. hen the gate is again to go to work the pressure in the cylinders is to be relieved, thus allowing the lungers and the gate to descend and the ms to be restored inthe fiat screw extensions, after which pressure may again be put on the gate by means of the screws.

In the drawing the gate is illustrated in position for usedown fairly close to the bridgepiece, the pins in such case being employed in the lower erforations in the fiat screw extensions. I however, the form of 'iece to be dealt with is such as to require, w e the work is being done, a considerable distance between the bridge-piece and the gate then higher up in the flat screw extensions and the plungers will be em' loyed in supporting the gate at the desired ow point and in quickly elevating it above such oint.

It is to be observed t at the working motions of the gate are substantially the same as could be gotten if, instead of the fiat screw extensions, the screws extended, as-threaded members, all the way down to the gate. In such case, however, long and tedious screwing operations would be required in effecting extended raisings and lowerings of the gate, while in the present case, the idle rising and falling motions of the gate are quickly sure derived from the screws is to be relieved the pins will be inserted in selected holes efl'ected by means of the plungers, the slow powerful action of the screws. being limited to a comparatively short range of motion.

1 claim:'

1. A bending machine comprising, a pair of housings, a bridge-piece connecting the housings and forming a lower press-member, a gate formin the upper ress-member and havin its en s arranged or vertical motion in sai housings, a cylinder under each end of said gate, plungers in the cylinders with their upper ends engaging under the gate, means or admitting pressure fluid to and exhausting it from the cylinders, a screw device at the top of each housing, a downward 8X- tension from each screw device to the appropriate end of the gate, the gate being vertically movable relative to such extensions, and means cooperating with said extensions and the gate to limit the downward motion of said extensions relative to the gate, combined substantially as set forth.

2. A bending machine comprising, a pair of housings, a bridge-piece connecting the housings and forming a lower press-member, a gate forming the upper press-member and having its ends arranged for vertical motion in said housings, a cylinder under each end of said gate, plungers in the cylinders with their u per ends engaging under the gate, means or admitting pressure fluid to and exhausting it from the cylinders, a nut journaled in the top of each housing over the appro riate end of the gate, means for turning sai nuts, a screw in each nut, a flat extension from the foot of each screw downward to and through a perforation in the appropriate end of the gate, said flat extension be-' mg provided with a vertical series of perforations, and pins adapted for insertion in sedevices for moving the u per press-member upwardly, and coupling evices between the screw devices and the upper ress-meinber, combined substantially as set orth.

AUGUSTUS WOOD. Witnesses:

M. S. BELDEN, ELMER R; SHIPLEY. 

